AirHint found the following cheapest return flights from Washington (IAD) to Sydney (SYD) in March 2026 (see full year).

Return flights

10 Mar - 25 Mar	Frontier Airlines
10 Mar - 07 Apr	Air Canada
26 Mar - 31 Mar	Frontier Airlines
09 Mar - 23 Mar	Frontier Airlines
02 Mar - 09 Mar	Air New Zealand
08 Mar - 15 Mar	Frontier Airlines
30 Mar - 08 Apr	Air Canada
14 Mar - 21 Mar	Air Canada
01 Mar - 13 Mar	Turkish Airlines
22 Mar - 05 Apr	Air Canada
14 Mar - 30 Mar	Air New Zealand
01 Mar - 10 Mar	Air Canada
01 Mar - 11 Mar	Air Canada
28 Mar - 03 Apr	Etihad Airways

Also check the deals for one-way flights from Washington to Sydney in March.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to Sydney in March from $1097

Return flights